Coring device



Nov. 8, 1927.

R. R. HALL CORING DEVICE Filed Oct. 23. 1922 v A Q 4 I INVEN TOR: J4

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PATENT RALPH R. HALL, QF LONG BEACH, CALIFORNIA, ASSIGNOR F ONE-HALF TO WILLIAM A. TROUT, OF LONG BEACH,'CALIFORNIA.

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Application filed October 23, 1922. Serial No. 59%,441.

This invention relates to coring devices, and particularly to a device adapted to punch a given section of earth strata so that the given section which may lge termed. a

5 core, may be extracted from a well hole to determine the formation and extent of materials beneath the surface. A device of this character is extensively used by contractors for testing sites for building foundations in the mining industry, which will show the character of the earth found at a great. depth, as well as testing sites for docks, piers, river borings, etc. A device of this characteris particularly applicable in determining the character of earth formation in drilling well holes. It is also of great value in coal regions, as accurate data may be obtained from the strata through which the bore is assing. An '0 ject of this invention is to provide a device of the character stated which is easy to. operate and which will extract a core with accuracy and economy and of sufficient size to procure reliable geographical,

data.

Various features of the invention will be set forth. in a detailed description and the invention has for an object the provision of an improved coring means which will be superior in point of relative simplicity and inexpensiveness, taken in conjunction with utility, durability and general efliciency and serviceability. a With the above mentioned and other objects in view, the invention consists in the novel and useful provision, formation, construction, combinatign, association and interrelationof parts, members' and features, as illustrated in some of its embodiments in the accompanying drawing, described in the following general description, and finally pointed out in claims.

In the'drawing:

Figure 1 is a.view partly in section of the improved coring means in the act of "extracting a core of earth formation;

Figure 2 is a cross sectional view of the coring device;

Figure 3 is a cross sectional view, taken on the line 33 of Figure 2; and

.Figure 4 is a fragmentar view, certain parts being in section, showing the various elements of the coring device in unassembled relation.

' Corresponding parts in all the figures are tubular drill, Z) a split liner receivable withpins 3' carried by one of the sections enter- -has for a portion of its length an internal designated by the same reference characters.

Referring with particularity to the draw: 1ng, "the improved coring means is designated in its entirety by A, of which a is a in the tubular drill a, and c a pin member. The pin member is formed in two sections 1 and 2, which sections are adapted to be held 1n co-actingrelation as by means of dowel ing recesses 4 carried in the other section. The pin 0 is formed with a reduced and taper screw-threaded portion 5, and this reduced taper portion 5 is adapted to have a screw-threaded engagement with a box shown by dotted lines at 6 in Figure 1. This screw-threaded engagement with the box of course holds the two sections of the plain. 'co-acting relation. Said pin is provided with a longitudinal bore at, said bore being of varying diameter at diiferent lengths as at 7, 8 and 9. The point of juncture between the parts 7 and 8 of the bore 05 forms a shoulder against whichan end of the split liner 6 is adapted to shoulder. An'annular groove 10 is included as between the parts 8 and 9 of the bore 03 and said groove is adapted toreceive an annular flange 11 carried by one end of the drill a. The drill a tapered bore 12 and the split liner is formed with a varying external diameter adapted to fit within the tapered bore 12. A zone adjacent the working end 13 'ofthe drill a is internally serrated as shown at 14 with the open end or mouth of the said drill a beveled as shown at 15. In actual assemblage the split liner, both sections, are slipped within the tapered bore 12 of the drill at until an end thereof shoulders at the point 16. The pin 0, both sections thereof, are then slipped around the drill a and the flange 11 of the drill will be received within the annular socket 10 of the pin, and an end of the split liners b will shoulder at the point 8 within is united to a string of tubing as D, said tubing including within its length jar members, the said tubing may be lifted a distance and then dropped, and the chisel-like end of the coring means A will tend to penetrate the earth formation, as shown in Figure 1 so that the same will enter the coring means, as shown at 20; the ear h formation 20 being forced within the d ill will be wedged by the drill and retained within the liner b,\the teeth 14 of the drill preventing the core from being withdrawn from the drill and liner I). An upward movement upon the tubing will carryvthe core 20 with it and the coring means A may be readily disassembled by unscrewing the pin a from the box, whereupon the sections of said pin will separate, and the liner b withdrawn from the drill aafter which the sections of the 20 liner may be separated, giving a core of earth formation intact in every detail. A device of this character may be used with rotary drilling outfits, as well as with standard tools, and the drill a may be rotated so as to cut its way into the earth formation or a core may be obtained by percussive means. a

It is obvious that many changes and variations and modifications may be made in departure from the specific showing in adapting the invention to varying conditions of use and service, without departing from the true spirit of the invention.

Having thus disclosed my invention, I

claim and desire to secure by Letters Patent:

' 1; A pin and box, comprising separable members formed to receive and accommodate a core drill, in combination with a tubular core drill and a removable liner for the drill; the core drill being provided with an inner end enlargement, and the box having a recessed portion receiving said enlargement and whereby the thrust of percussive action is-transmitted from the core drill to thebox.

2. The combination, with astem and box; of a tubular tore drill adapted to be received within the box at one end portion, and a removable liner for the box; the pin and box comprising separable portions which when separated release the core drill and permit removal of the liner thereof with the core.

3. The combination, with a stem and box; of a tubular core drill adapted to bereceived within the, box at one end portion, and a removable liner for the box; the pin and box comprising separable portions which when separated release the core drill and p'ermit removal of the liner thereof with the 60 core; said liner comprising separable portions maintained in assemblage within the drill.

In testimony whereof, I have name to this specification.

RALPH R. HALL.

signed my I 

